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Old 03-17-2010, 09:14 AM
Joran Joran is offline
Join Date: Jun 2006
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Setting dataSize for the modifier plugin


I started developing my first modifier plugin for Vizard (see So what I am making is a modifier that gets the depth buffer information from a Camera. I have it working okay, the only part left is returning the data to the python script.

At the moment I use a fixed size texture (say 8 by 8). And I set the dataSize to 8 * 8 in the InitModifier procedure. As far as I understand each instance of the modifier will get it's own buffer of 64 floats. But I want to have a different texturesizes, which leads to a different dataSize for each instance. Is there some way to do this? Can I just change the dataSize, free up the data field and allocate a new buffer in the PerformModifier procedure?

Greetings, Joran.
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Old 03-18-2010, 10:41 AM
farshizzo farshizzo is offline
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Join Date: Mar 2003
Posts: 2,849
Yes, you can manually reallocate the data field. Just make sure that you set the dataSize member to the new size.

However, in your case I would suggest directly creating Python objects within your modifier plugin. For example, if you wanted to make some raw byte data available to your script, you could do the following:
PyObject *imageData = PyString_FromStringAndSize(buffer,bufferLen);

//Add python object to __main__ module
After this code is executed, there will be an myImageData variable available in the __main__ scope of your script.
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